Hyundai Ioniq: What to do in an emergency / If the 12 Volt Battery is Discharged (Hybrid Vehicle)

Hyundai Ioniq (AE) 2017-2021 Owner's Manual / What to do in an emergency / If the 12 Volt Battery is Discharged (Hybrid Vehicle)

Before Jump Starting

This vehicle does not have a regular 12V battery that needs periodic replacement. It is lithium ion polymer type integrated into the HEV high voltage battery. The vehicle has a 12V battery protection system that cuts 12V battery from vehicle draw to prevent full discharge.

Using the 12V Battery Reset Switch

Hyundai Ioniq. If the 12 Volt Battery is Discharged (Hybrid Vehicle)

1. Press the 12V Battery Reset switch to reconnect the 12V battery.

2. Start the vehicle within 15 seconds of pressing the 12V Battery Reset switch.

3. After starting vehicle (Hyundai Ioniq. If the 12 Volt Battery is Discharged (Hybrid Vehicle) indicator on), operate the vehicle safely outdoors in ready mode stopped and/or drive it for 30 minutes total to charge the 12V battery fully. If you do not start the vehicle immediately after pressing the 12V Battery Reset switch, the power of 12V battery is automatically disconnected after few seconds to save the 12V battery from additional discharge. If the 12V battery is disconnected prior to starting the vehicle, press the 12V Battery Reset switch again and then immediately start the vehicle as explained.

Repeated use of the 12V Battery Reset switch without a sufficient engine ON cycle (30 Min+) may cause over discharge of the 12V battery, which will prevent the vehicle from starting. If the 12V battery is over discharged to a point that the reset does not work, try to jump-start the vehicle.

Information

After starting the vehicle (Hyundai Ioniq. If the 12 Volt Battery is Discharged (Hybrid Vehicle) indicator on), the 12V battery is being charged whether the engine is running or not. Although there is no enginesound, it is unnecessary to depress the accelerator pedal.

The following items may need to be reset after the battery has been discharged or the battery has been disconnected. See chapter 3 or 4 for:

  • Power Windows
  • Trip Computer
  • Climate Control System
  • Clock
  • Audio System
  • Sunroof
  • Driver Position Memory System

NOTICE

External power source using 12V battery

The use of external power accessories may reduce performance and function of the vehicle. Especially, the use of dash cameras may shut off the power of the vehicle prior to the dash camera's automatic shut-down.

If the power of the vehicle is shut off, start the vehicle as explained. (refer to "Using the 12V Battery Switch")

If the Vehicle will not Start

Hybrid vehicle Be sure the shift lever is in P (Park). The vehicle starts only when the shift lever is in P (Park). This vehicle does not have a regular 12V battery that needs periodic replacement...

Jump Starting

In the event vehicle still does not have a functional 12V battery (check if interior lights will not turn on) then you can try a jump start to the engine compartment jumper terminals using a 12V booster pack or jumper cables from another vehicle's 12V battery according to the following instructions...

Other information:

Hyundai Ioniq (AE) 2017-2021 Owner's Manual: Lighting control


To operate the lights, turn the knob at the end of the control lever to one of the following positions: 1. DRL (Daytime Running Lights) OFF position 2. AUTO light position 3. Parking lamp position 4. Headlamp position Daytime running light (DRL) (if equipped) The Daytime Running Lights (DRL) can make it easier for others to see the front of your vehicle during the day, especially after dawn and before sunset...

Hyundai Ioniq (AE) 2017-2021 Owner's Manual: Fuel door open, Check fuel door (Plug-in hybrid vehicle)


Fuel door open (Plug-in hybrid vehicle) This message is displayed when the fuel filler door opens after the fuel tank is depressurized. If this message is displayed, you can refuel the fuel tank. Check fuel door (Plug-in hybrid vehicle) This message is displayed when the vehicle is driven with the fuel filler door opened...

Categories

Driver Position Memory System

Hyundai Ioniq. Driver Position Memory System

The Driver Position Memory System is provided to store and recall the following memory settings with a simple button operation.

- Driver's seat position
- Side view mirror position
- Instrument panel illumination intensity

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